Boo, by using PDF format you can have the music notes displayed, rather than just chords and lyrics. Lots of people have shared their Fakebooks or sheet music in this format and they are pretty easy to find on the internet. In fact some 6,000 were shared here today.
I'm not addressing the legality of sharing these files but they are there and apparently it's safe to download and use them. And, you can always make your own PDF files. Either way, you can display your songs on laptop, PC or tablet. I'm not an expert and don't routinely use them, but I'm sure there are lots here who do and can tell you more. It's way better than lugging books around.